Customization

By default, Spellchecking calls “/controller/spellchecker”. But this
won't always be where the spellchecker method is accessible. But you
can easily change where it should call by supplying the following setting
to the options hash on the uses_tiny_mce declaration in the controller.

:spellchecker_rpc_url => '/blog/posts/spellchecker'

Also, if you want to have other languages spellchecked, make sure
they're installed for Aspell to use and then add to the comma delimited
value of :spellchecker_languages in the format of

FriendlyName=code

So the value for English, French, German and Spanish would look like this
for example